QT离散度对老年严重心力衰竭病人无预后价值

QT dispersion has no prognostic value for the aged patients with advanced congestive heart failure

目的：探讨QT离散度（QTd）对老年严重心衰（CHF）病人的预后价值。方法：362例老年严重心衰患者人院时记录基础静态12导联同步心电图，计算QT离散度，平均随访（7．2±4．8）个月。结果：随访期间142例（39．2％）病人死亡．QT离散度为（76．3±28．6）ms，存活者220例，QT离散度为（74．8±30．2）ms。两组间比较无明显差异（P〉0．05）；生存分析显示QT离散度对总死亡率（RR1．00。95％CI1．00～1．00），心源性死亡率（RR 1.00，95％CI1．00～1．01）及心律失常性死亡率（RR1．00。95％CI1．00～1．01）均无预后价值（P〉0．05）．结论：QT离散度（QTd）对老年严重心衰病人的总死亡率，心源性死亡率及心律失常性死亡率均无预后价值。

Objective： To evaluare the prognostic value of QT dispersion （QTd） for the aged patients with advanced congestive heart failure （CHF）. Methods; A baseline ECG was available in 362 aged patients with advanced CHF. They were followed up for （7.2±4.8） months. Results, During the follow-up period of （7.2±4.8） months 142 patients （39. 2%） died. , the QTd was （76.3±28. 6） ms. The QTd of survivors was （74. 8±30. 2） ms. There was no significant difference of QTd between survivors and no survivors （P〉0. 05）. Survival analysis revealed that no prognostic information derived from QTd regarding all-cause mortality （risk ratio 1. 00, 95% CI 1. 00 to 1. 00）, cardiac mortality （risk ratio 1. 00, 95% CI 1. 00 to 1. 01）, or cardiac arrhythmic mortality （risk ratio 1. 00, 95± CI 1. 00 to 1. 01）. Conclusion. QT dispersion has no prognostic value for aged patients with advanced CHF.